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Physics: Must Pass

I have to pass physics.

QuestionAnswer
standing wave incident and reflected pulses are created with periodic frequency; appears stationary
node point with complete destructive interference (zero energy)
antinode largest amplitude; 1/2 way between nodes
infrasonic frequencies below 20 Hz
Ultrasonic frequencies above 20,000 Hz
Pitch measure of how high or low a sound is; frequency of sound wave
wave fronts 3-D distribution of waves (a sphere)
Plane waves seem like a straight line
timbre quality of tone resulting from the combination of harmonics present at different intensities (sound quality)
chromatic scale 12 note scale; 13th note is twice 1st notes frequency
beat periodic variation in amplitude of sound wave that is the superposition of two waves of slightly different frequencies
beat frequency difference in frequencies of two similar sound waves
amplitude max displacement from equilibrium
wave length distance between identical positions on consecutive waves
frequency number of waves passing a fixed point per unit time
period time required to complete a cycle
wave motion of a disturbance to a medium
medium matter through which wave travels
mechanical waves one that requires a medium to travel through
electromagnetic waves doesn't require a medium
pulse wave wave made of one traveling pulse
periodic wave wave made of periodic and continuing pulses
simple harmonic motion created by continuous pulses (periodic wave); follows rules for sine waves
transverse wave wave with vibration perpendicular to direction of wave's motion
longitudinal wave wave with vibration parallel to motion of wave (sound)
sympathetic vibrations vibration caused by resonance; starts vibrating because of the waves of second object
resonance phenomenon that occurs when the frequency of a force applied to a system matches the natural frequency of vibration of the system, resulting in a large amplitude of vibration
fundamental frequency lowest frequency of vibration of a standing wave; also called 1st harmonic
harmonics fundamental and successive multiples of the fundamental
intensity rate at which energy flows through a unit area perpendicular to direction of the waves motion
threshold of hearing 1000 Hz
Threshold of pain 1.0 W/M^2
relative intensity intensity of wave divided by intensity of threshold of hearing
decibel level measure of loudness
compression high density/peak
rarefaction low density/trough
wave speed distance traveled per time
damping amplitude of a wave diminishes over time due to energy loss
super-position combination of two overlapping waves
interference interaction of two waves
constructive interaction two waves add in same direction
destructive interaction two waves subtract due to a + and - amplitude
reflection interaction bouncing back of a wave at a boundary
 

 



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